[Bugfix] Option --require-override is not working for conanfile.txt

conans/client/graph/graph_manager.py

@@ -201,7 +201,8 @@ def _load_root_consumer(self, path, graph_lock, profile, ref, require_overrides)
                                      ref.user, ref.channel, validate=False)
             root_node = Node(ref, conanfile, context=CONTEXT_HOST, recipe=RECIPE_CONSUMER, path=path)
         else:
-            conanfile = self._loader.load_conanfile_txt(path, profile, ref=ref)
+            conanfile = self._loader.load_conanfile_txt(path, profile, ref=ref,
+                                                        require_overrides=require_overrides)
             root_node = Node(None, conanfile, context=CONTEXT_HOST, recipe=RECIPE_CONSUMER,
                              path=path)
 

conans/client/loader.py

@@ -261,14 +261,20 @@ def load_conanfile(self, conanfile_path, profile, ref, lock_python_requires=None
         except Exception as e:  # re-raise with file name
             raise ConanException("%s: %s" % (conanfile_path, str(e)))
 
-    def load_conanfile_txt(self, conan_txt_path, profile_host, ref=None):
+    def load_conanfile_txt(self, conan_txt_path, profile_host, ref=None, require_overrides=None):
         if not os.path.exists(conan_txt_path):
             raise NotFoundException("Conanfile not found!")
 
         contents = load(conan_txt_path)
         path, basename = os.path.split(conan_txt_path)
         display_name = "%s (%s)" % (basename, ref) if ref and ref.name else basename
         conanfile = self._parse_conan_txt(contents, path, display_name, profile_host)
+
+        if require_overrides is not None:
+            for req_override in require_overrides:
+                req_override = ConanFileReference.loads(req_override)
+                conanfile.requires.override(req_override)
+
         return conanfile
 
     def _parse_conan_txt(self, contents, path, display_name, profile):

conans/test/integration/command/install/install_test.py

@@ -430,6 +430,17 @@ def test_install_cli_override(self, client):
         client.run("install . --require-override=zlib/2.0")
         assert "zlib/2.0: Already installed" in client.out
 
+    def test_install_cli_override_in_conanfile_txt(self, client):
+        client.save({"conanfile.py": GenConanfile()})
+        client.run("create . zlib/1.0@")
+        client.run("create . zlib/2.0@")
+        client.save({"conanfile.txt": textwrap.dedent("""\
+        [requires]
+        zlib/1.0
+        """)}, clean_first=True)
+        client.run("install . --require-override=zlib/2.0")
+        assert "zlib/2.0: Already installed" in client.out
+
     def test_install_ref_cli_override(self, client):
         client.save({"conanfile.py": GenConanfile()})
         client.run("create . zlib/1.0@")